Line-spacing mechanism for type-writing machines.



0. G. KAVLE.

LINE SPACING MECHANISM FOR TYPE WRITING MACHINES.

Patented June 29, 1909.

APPLICATION FILED APR.14,1906.

2 SHEETS-SHEET 0. G. KAVLE.

LINE SPACING MECHANISM FOR TYPE WRITING MACHINES. APPLICATION FILED APR. 14, 1906.

926,572. Patented June 29, 1909.

2 SHEETS-SHEET 2.

In we 71202,

aw; z M4 75in asses I 5.6L. 1M, j/W/W gag/w lZi orn ys.

' To (i-ZZ whom; it may concern:

- )laii view of UNITED STA ES PATENT OFFICE.

OSCAR G. KAVLE, OF SYRACUSE, NEW YORh, ASSIGNOR TO HARVEY A. MOYER AND EMMIT G. LAlTA, OF SYRACUSE, NEW YORK.

- LINE-QPACING MECHANISM FOR TYPE-WRITING MACHINES.

uspecifieati on of Letters Patent.

Patented June 29, 1909.

Application filed April 14, 1906i Serial No. 311,757.

Be it hno'wn that I, OSCAR C. KAVLE, a citizen olfltlie United States, residing at Syracuse, in tliecounty of Onondaga and State of New York, have invented a new and useful Improvement in Line-Spacing Mechanisms for T ype li ipiting Machines, of which the fol lowing is a. specification.

This invention relates to line spacing mechanisms, or platen rotating means for typewritinp machines, and the principal object of the invention is' to produce a desirable and efficient inechanisn'i tor the purpose of compact, simple and light construction.

More specific objects of the invention are to so constructand arrange those partsof the mechanism which are located between the platen and the platen carriage that they will permit the use of wide paper or sheets on the platen which project. beyond the ends of the platen without interfering in any way with the sheets in the operation of the machine, so that wide sheets can be printed on a. shorter and lighter carriage than is usually necessary; to arrange and construct the mechanism so as to enable the ready removal of the platen from the, carriage; toprovide simple and desirable means for adjusting the ii'ieehaniem to produce single, double or triple line spaces by equal movements of the line space lever; to render the line spacing mechanism noiseless in action and to prevent the overruniiing of the platen; and to provide a desirable friction brake which, when brought into play, throws the platen lliiliiilif dctent out of action, and serves to hold the platen in any position to which it is turned.

Other obiccts of the invention are to improve the platen rotating: means of typewrit iiig machines in ilic respects hereinafter pointed out and sci forth in the claims.

in the accoiiipai yiiig drawings, consisting of two sheets: l ire i is an end elevation of a typewriterc-zi niecprovided wit h lino spac- Fig. l is a. pcrspcctivc view of oiie end of the platen and pa ts of the line spacing iiiccha-iiisiii. same parts in l ne 3---C Fig. 1,-loohing toward the f o 1 of ihe machine. Fig. 4 is a thrtzii'i'iilgj with ihe central v. i "i and ii are end ihc icr. showing the portion lirohcn a sect ioinil clevai ion.

friction brain Hli:l.\'i"-ll and applied, respecl.i\'civ. Fig. 7 is an end sectional elevation Fig. I; is a. sectional elevation of the of'the slots 0'.

of the platen and line space mechanism in. line 7-7, Fig. 4. Fig. 8 is a rear elevation, partly in section, on an enlarged scale, of one end of the platen and line space mechanism.

Like letters of reference refer to like parts in the several figures.

A, Figs. 1 and 4, represents the carriage of a typewritin machine, B the rotatable platen journal ed thereon,.and C'the carriage shift frame or other support on which the carriage travels laterally of the machine to produce the letter spacing. The carriage shown consists of vertical end plates 0. a,

rigidly connected at the lower portions byla body frame or casting a anda front or scale bar a, and moves on horizontal guides-or ways a between its body frame and the support port C are preferably, though not necessarily, constructed as fully described inniy application for patent, Serial No. 311,758, filed, April 14, 1906. l

The platen B, which may be of any usual or suitable construction, is secured to a platen shaft (1 which is rovided at its ends with the usual finger w ieels d for turning the platen, and is journaled in the carria e in such manner that the platen can 6 readily lifted off of the carriage. Preferabl bearing sleeves E E surround the she t between the ends of the platen and the hubs of the finger wheels (1, and are provided with reduced segmental circular grooved or reduced portions 6 which rest in correspondiiigly'sha'ped seats 0 (shown by dotted lines in Fig. 1-) in the carriage end plates. Slots 0" extending from the bearing seat-sto the upper edges of the end plates enable the insertion of the bearing sleeves into and their removal from the seats, but these slots are narrower than the seats and when the bearings are in the position shown in the drawings. with the [lat sides of theifr i ediiced portions horizontal or crosswise of the slots, they cannot be lifted out of their seats. They are removed by first turning them in the scats'until the flat sides of the reduced portions are parallel with the edges The bearing'slcevcs are held from turning to releasing position, preferably by spring ariiisf which are fixed to or l'oriiicd 9n the outer ends of the bearing sleeves and are provided at their free ends with pins-f, Fig. 8, adapted to enter holes f, Figs. 1,! and S, in the end plates of the The carriage and shift frame orsupcarriage, and have knobs f for withdrawing the pins from their holes.

While the detachable bearing described it is fixed. .Said shaftis located outside of the carriage end plate, being journaled in. suitable bearings hon the end plate. and is provided witha rigid arm h? which projects inwardly through a slot hflFig. J in; the end plate a and is pivoted toa link i which is located between the end plate and adjacent endof the platen and ivoted at one end. which extends toward t e platen shaft. to a pawl lever K. This pawl lever is also arranged between the-end plate and platen,

is pivoted at its lower end below the platen shaft on a suitable pivot stud k. projecting inwardly from the end plate, and extends upwardly nearly to the top" of the platen,

being preferably curved to pass in rear of the platen shaft. The pawl lever and line space'lever are held in their normal position and returned to suchposition after operation by a suitable spring. A spring is is shown (see Figs. 2, 3 and 8) coiled about the boss on the end plate for the pawl lever pivot with one end hooked around the lever and the other end entering a hole in-the end late a. A pawl L is pivoted to and extends orwardly from the upper end of the pawl lever and has a lateral projection or nose Z, Figs. 2, 4 and 5, at its front end adapted to engage with the teeth of. a ratchet-wheel Z secured to the platen. The ratchet wheel preferably consists of a plate. screwed or otherwise fixed directly to .the end of the platen. The front end of the pawl is pressed downwardly toward the teeth of theratchet wheel by a flat spring I secured to thepawl lever and bearing at-its free end against a pin Z on the upwardly and rearwardly projecting tail or rear end of the pawl, sera,Figs. 2 and 7. The nose of'the held out of engagement. with the ratchet teeth against the action ofsaid spring I by a pawl lifter M arranged'beside' the ratchet wheelandhaving a segmental circular edge on which a depending projection at the front end of the pawl is adapted to ride in the movements of the pawl. When the pawl lever is moved rearwardly to turn the platen, the pawl is held off of the ratchet teeth until its front end clears the rear edge of the pawl lifter and it is only the remainder of the movement of the pawl which is effective in turning the platen. By shifting .the pawl lifter forwardlyor rearwardly around the axis of the ratphet wheel the effective pawl is normally movement of the pawl can be lengthened or shortened to increase or decrease the amount of rotation of the ratchet wheel.

Thus the platen can be turned for one, two

or more line spaces by equal movements of the line space lever and pawl lever by properly adjusting the pawl lever M. i

The pawl lifter preferably consists of an arm or plate fixed to or formed on the inner end of the adjacent bearing sleeve E for the platen shaft, and this bearing sleeve is made rotatably adjustable for shifting the pawl.

,lifter. Therefore, the end plate a in which said bearing sleeve is seatedis provided with a series of the holes f 2 into either of which the 0 'pinf on the spring arm at the outer end'of the bearing sleevec-an be engaged. B en-" gaging the pin f in the proper hole the pawllifter is held in the proper position for producing single. double or triple line spaces. 5

The pawl lifter could be separate from the bearing sleeve and separately adjusted and produce-the same results. ,1

X represents a stop for limiting the movement of'the pawl. The stop, see preferably consists of a stud secured on the.

inner side of the carriage end plate a by a screw n passin through the end plate. The stud 1s locate in the path of and is adapted to be engaged by the tail of the pawl L.

hen the tail of the pawl strikes the stop, not only is the movement of the pawl, pawl lever 'and linespace lever arrested, but the nose of the pawl is pressed forcibly down between two teeth of the ratchet wheel, and the 10 platen is thus effectuallv held from overrunning the movement of the pawl. As soon as the operator releases the line space lever, the pawl lever is returned by its spring k and the pawl is thus moved away from the stop and its front end rides up on the pawl lifter which holds the pawl off of the ratchet teeth, so that noise is avoided in the return movement of the pawl. The arm 71 on the shaft of the line space lever G is set at such an angle that 1 0 it approaches near to the line of the link i when the pawl stri es the stop N, and the effect of the arrangement is to allow a rapid movement of the pawl at the, start or while passing over the pawl lifter, and to lessen its speed toward the end of its movement, thereby lessening the s'hock of stopping the pawl and creasing the leverage of the hue space lever so as to more securely hold the ratchet wheel and platen from overrunning when the pawl is arrested. l

0, Figs. 2, 4-8, represents a pivoted det-ent carrying a small roller 1 at its free end which is pressed by a suitable spring 1) against the teeth of the ratchet wheel for holding the platen in the usual manner. Preferably the detent is pivoted. on the stop stud N and a curved spring p is employed having a wide upper end bent around the stud N with inbent edges fitting in slots in the opposite sides of the studto secure the spring thereon. The securin .screw 'n for the stud N enables the stud to e rotatably adjusted to give the desired tension in the. detent spring.

- When it is desired to lift the platen off of the carriage, the pawl L is turned up to the up to this osition its spring 2 bears,

normal position by hand.

Figs. 3, 5 and 6, represents a friction I I I I u I brfim conslstmg of a ring loosely, surrounding the hub of the platen in a circular central openingq in the ratchet wheel. The outer e( ge of the brake ring and edge of the openingq are conical or beveled, as shown. An arm or lever q rigid with the brake ring extends rearwardly therefrom and is provided -with 'aprojection 9 having a cam edge which bears against the project- .ing end of the roller pintle of the detent O. When.the brake lever is raised to the position shown in Fig. 6, the cam edge of the projection gipresses the detent roller out of contact with the teeth of the ratchet wheel when thedetent is thus held, acts to wedgethe conical brake ring in the opening in the and it is held;in such position by the engagement of the roller pintle in a notch g in the edge of the cam projection q. The pressure of the detent spring on the brake lever,

ratchet wheel, thereby creating sufficient friction on the ratchet wheel to hold the platen againstaccidental rotation. l/Vhen the brake 'is thus applied and the detent held away from the ratchet wheel the platen can. be

the brake. depends onthe angle of its conical edge'and turned to any desired position, by the fii'iger wheels (1, and held there by the friction of The friction caused by the brake I space of the diameter of the platen and that e brake lever, detent and tail of the pawl,

I which extend beyond the limits of such space, project rearwardly and upwardly from the platen. The parts arranged in this way permit the use of wide sheets extending beyond the ends of the platen, forthe sheets can pass in the usual forward direction under the brake lever and detent and up around the platen under the pawl lever and its operat ng hnk and arm, and rearwardly from the platen over the pawl,

brake lever and detent without interference from z i-h, vof said parts. Sheets-as wide as from said pan the distance between the carriage end plates can therefore be used, and the effect of this construction isto permit the carriage for a given width of paper to be made nearly one inch shorter than usual, nith a consequent reduction in weight and gain in compactness.

R, 1 ig. 1, represents a-guard rail, one of which is arranged at each end of the car-' riage. These rails are curved, being attached at their ends to the front and rear edges of the carriage end plates, and have substantially horizontal portions located above the parts-of the carriage operating mechanism located at the ends of the carriage to-prevent the operators hands from striking these parts.- The: guard-rails are not claimed. herein,- but are disclosed-and claimed in said application -for patent, Serial No. 311,758, filed Apr. 14, 1906.

I claim as my. invention:

1. In a typewriting machine, the combination of a carriage, a rotatable platen supported by the carriage, a line space lever, and a pawl lever separately pivoted to the carriage, operative connections bet-ween said levers, a ratche't wheel connected to the platen, and a )awl for transmitting motion lever to said ratchet wheel, said operative connection, pawl lever, andpawl being arrahlgcd substantially within a circular space directly opposite the end of the platen and o'l'like diameter therewith, whereby a sheet passing around the platen can project beyond the same around said parts substantially asset forth.

2. ln a typewriting machine, the combination of a carriage, a rotatable platen sup-- ported on the carriage, a line space lever mounted on the carriage, comlections between the line spar e lever and the platen located between one end of the platen and the adjacent end of the carriage, andv a brake lever and brake at the end of the platen, said parts bcin g arranged within the SPil bUlln(l-\ ed by the projecting edgeof a sheet on the )laten'to permit the sheet to pass under the brake lever. and around said connections without interference, substantially as set forth.

3. In a typewriting machine. the combination of a carriage, a rotatable platen supported on the carriage, a line space lever mounted on the carriage,ronncctions between the line space lever and the platen located between one end of the platen and the adjacent end of the carriage, and a line space tion of a carriage, a rotatable platen supportcd'on the can-riagc, a line space lever a line space adj ust-ing device, a platen detent,-

and a rake, all located between one end of the carriage and the adjacent end of the 1 platen and arranged within the space bounded by the projecting edge of a sheet on the platen to permit sheet to pass under and around said parts without interference, substantially as set fo.i-'th. I

5. In a typewriting machine, the combination of a carriage, a platen journaled on the carriage, a line space lever on the carriage, a separate pawl lever arranged .between one end of t 1 cent end of the platen and connected to said line-[s acelever, a pawl connected to said pawl ever for turning the platen, said pawl lever, pawl and the connection'between said line space and and levers being contained substantially within a circular space directly opposite to the end of the platen and of like diameter therewith, substantially as set forth. I j

6. In a typewriting machine, the combination of a carriage which moves laterally of the machine, a platenjournaled on the carriage and moving therewith, a line space lever pivotall supported b the carriage to swing latera y. of the machine, an upright pawl lever pivotally connected at its lower end to the carriage, and connections between the two levers and bet-ween the pawl lever and platen arranged within the space bounded by the projecting edge of a sheet passing around the platen, substantially as set forth.

7. In a typewriting'machine, the combination of a carriage, a plateg journaled on the carriage, a line space lever voted on the outside of the carriage, a pawFlever pivoted on the inside ofthe carriage, operative connections between the two levers and between the pawl lever and platen, said pawl lever and connections bein arranged adjacent to the end of the platen within the space bounded by the projecting edge of a. sheet passing around the platen, substantially as set forth.

8. 'In a typewriting machine, the combination of a carriage, a laten journaled 011 the carriage, a forwar ly -projecting line space lever havin a vertical pivotal support, and a pawl lever aving a horizontal pivotal support atits lower end, both lever pivots being supported by the carriage adjacent to one end of the platen, and connections between the two levers and between the pawl lever and platen arranged substantially within the space bounded by the projecting edge of a sheet passing around the platen, substantially as set-,i'orth.

9. In a typewriting machine, the (zombi nation of a carriage, a platen journaled on i the carriage a toothed wheel secured to one end of theplat'en, a line space lever on the outside of the adjacent end of the carriage,

e carriage and the adj a,

and a separate pawl lever arranged between E said ends of the carriage and the platen and g connectedto said line space lever, a awl on said p awl lever engaging said toothed wheel, said pawl lever, pawl and connection being arranged within the spacebounded by the projecting edge of a sheet passing around the platen, substantially as set forth.

10. In a tvpewriting machine, the combination of a carriage, a platen journaled 011 I the carriage, a toothed wheel secured to one endof said platen, a line space lever on the out-side of the adj ace'nt end of the carriage, a pawl lever pivoted on the inside oflsaid end of the carriage below the axis of the platen and above the underside of theplaten, conspace lever, and a pawl connected to the uptoothed wheel, substantially as set forth.

nation of a carriage, a platen journaled on thecarriage, atoothed wheel secured to one end of the platen, a line space lever on the outside of the adjacent end of the carriage, an upright pawl lever pivoted on the inside of said end of the carriage below theaxis of the platen, aconnection between said pawl lever and said line spacelever, and a pawl connected to the upper end of said pawl lever and engaging said toothed wheel, said pawl lever, pawl and connection being arranged substantially within a circular space of the diameter of said platen, substant ally as set forth.

- 12. In a typewriting machine, the combiconrrected and which is journaled on the out nection between said pawl lever and line nation of a carriage, a platen supported on p per end of said pawl lever and engaging said '11. In a typewriting machine, the combi- V side of the adjacent end of the carriage, an

upright pawl ever pivoted on the inside of said end of the carriage, an arm secured to.

said shaft, a link connecting said arm to said pawl lever, and a pawl secured to the upper end of said toothed whee substantially as set forth.

- 13. In a typewriting' machine, thecombination of a carriage, a platenjournaled on the carriage, a toothed-wheel secured to one adjacent end of the carriage, a separate pawl, lever arrangedbetween said ends of the carriage and platenand connected to said line space lever, a pawl on said engaging said toothed wheel, aspr'ing located inside of said end of, thencarriage for returning said ,levefsto Donna] osition after 0' eration, sunstantiallv as set 01th. e114.

nation of a carriage, a platen journaled on the carriage, a toothed wheel connected tosaid platen inside of the end of the carriage, a line space lever on the carriage, a separate awl lever andengaging saidend of the platen, a line space lever on the awl lever a typewriting machine the combipawl lever pivoted on the carriage between the same and sa1d toothed wheel, a pawl on said pawl lever for actuating said toothed wheel,

and a stop on the carriage to limit the movement of said pawl, substantially as set forth.

15. In a typewriting machine, the combination of a carriage, a platen having end journals removably sup orted on the carriage, a lever arranged etween one end of the carriage and the adjacent end of the platen at one side of the platen journal, means for operating said lever connected thereto below said journal, and a device arranged over said journal and connected to said lever for turning the platen and being movable to allow the removal of the platen from the carriage, substantially as set forth.

16. In a typewriting machine, the combination of a carriage, a laten removably supported at its ends on t 1e carriage, a toothed wheel connected to one end of the platen, an upright pawl lever adjacent to one end of the platen, means for actuating the same, a paw at the u per end of said pawl lever for actuating sai toothed wheel, said pawl bein movable to permit the platen to be hits out of the carriage, and. means for holding the pawl in the position to which it is moved, substantially as set forth.

17. In a typewriting machine, the combination of a carriage, a platen, a shaft to which the platen is secured and which is removably su ported in the ends of the carrings, a toothed wheel secured to one end of the'platen, an upright pawl lever adjacent to said toothed wheel, means for actuating said pawl lever, a pawl on said lever overhan 'in the platen shaft for actuating said tootlae Wheel, saidpawl being adapted to be moved from its position over the platen shaft, and a s ring for holding said pawl in its normal and abnormal positions, substantially as set forth.

. 18. In a typewriting machine, the combination of a carriage, a platen supported thereon, a toothed Wheel secured to one end of the platen, a line space lever, a pawl lever arranged between the endloi' the platen and the adjacent end of the carriage and connected to said line space lever, a pawl on said pawl lever for actuating said toothed wheel, said pawl lever and its connection, with the line space lever being arranged Within the space bounded by the projecting edge of a s cet passlng around the p aten, a brake for the platen, and a brake lever which extends rearwardly relative to the platen, substantially as set forth.

19. In a typewriting machine, the combination of a carriage, a platen journaled thereon, a plate secured to the platen, and a friction brake arranged to act at the center of said plate, substantially as set forth.

20. In a typewriting machine, the combination of a carriage, a platen 'journaled thereon. an annular friction brake arranged substantially concentric with the platen at one end thereof, and an operating lever for moving said brake to an eccentric position to b91111 against the platen, substantially as set fort i.

21; In a t vpewriting machine, the combi-- nation of a carriage, a platen journaled thereon, a plate secured to .one end of the platen and provided with a conical opening, a conical friction brake arranged in said opening, and means for actuating said brake, substantially as set forth.

22. In a typewriting machine, the combination of a carriage, a platen journa-led thereon, a plate secured to one end of the platen and provided with a conical opening, a conical friction brake arranged in said opening, and a spring for forcing the. brake against the conical edge of said opening, substantially as set forth. 1

23. Ina typeivriting machine, the combination of a carriage, a platen journaled thereon, a toothed wheel secured to said laten, means for actuating said toothed w eel to turn the platen, a detentheld by spring pressure against said toothed wheel, a brake for the platen, and an arm rigid with said brake for operating the same and arranged to directly engage said det nt to hold the same out of engagement wit 1 said toothed wheel,

the brake being'applied by the pressure of said detent on saic arm, substantially as set forth.

Witness my liand,'this 4th day of April, 1906.

OSCAR C. KAVLE.

W'itnesses:

CHEs'rnn W. R1111), FRANK E. REID. 

